Upgrade iPhone 4 to iOS 4.1 Without Baseband Update How To

ExceptGame Center, IOS 4.1 comes with a new version of the baseband (ie, 2.10.4) for the fourth iPhone will now no unlock tool to unlock this band. If you upgrade to 4.1 and conservation iOS unlock you have to take additional steps to improve.
This tutorial will guide you through how to upgrade to IOS 4.1, but without the update of the band. Since the baseband (ie, 1:59:00) may receive, you can still unlock your iPhone ultrasn0w 4 after IOS upgrade 4.1.
Before proceeding, make sure you read the following notes:

• This guide is for iPhone 4 ONLY. Please do not use it for other models of the iPhone.
• Make sure the latest version of iTunes (ie 10.0.1). If iTunes does not update. You can download it here.
• This guide is provided for Windows and Mac users
• The methods are tested with the iPhone works great quarter. However, there is no 100% guarantee that it will be on your iPhone. Use at your own risk.

Well, let's begin.

Preparation

1. First load TinyUmbrellaOfficial website. TinyUmberlla compatible with Windows, Mac and Linux. Please download the correct version for your platform.

2. Download the firmware from 4.1 iOShereand stored in a folder.

Launch and start TinyUmbrella SAT server

3. TinyUmbrella release. For Windows, use "Administrator" to start the program. If you have Mac, you are prompted for your password.

4. Connect your iPhone and it should automatically recognize TinyUmbrella.

Restore, JAILBREAK, upgrade, Update, without itunes, baseband,

Tip:If you have not saved your SHSH drops, be sure to click on "My SHSH Save" to save it. This ensures you can downgrade your iPhone, if needed.
5. Click "Start Server SAT. TinyUmbrella kill iTunes and you should see the" Running "state of the server technical support services.

Restore the IOS firmware 4.1 of

6. If everything works, you can now restart iTunes iOS 4.1 of the firmware restoration. Pay attention to the server to restore the IOS SAT. Otherwise the band is not maintained.
7. Select your iPhone in iTunes. If you are using Windows, hold down the Shift key and click "Restore" button. For Mac users, press and hold in place the "option" key. Then select the firmware file (ie iPhone3, 1_4.1_8B117_Restore.ipsw) that you downloaded in step 2 and click OK.

8. iTunes, new iPhone 4.1 to IOS. Just sit back and wait until the process is complete.
9. When finished, you will be asked to iTunes error 1004th Do not worry. That's what to expect. It's actually a good sign that your iPhone to 4.1 without upgrading the IOS upgrade the baseband.

10. Keep your iPhone connected. Back to TinyUmbrella and click the "kickoff recovery device" button. Your iPhone will reboot.

That's it! iOS old with 4.1 baseband

After rebooting the iPhone now Ios 4.1 but with the previous version (1:59:00) run from the band. This means you can still uselimera1nLeak andultrasn0wTo unlock the iPhone quarter